Search a number
-
+
199999972 = 22311612903
BaseRepresentation
bin10111110101111…
…00000111100100
3111221100001101101
423322330013210
5402144444342
631502405444
74645654204
oct1372740744
9457301341
10199999972
11a2992a37
1256b90884
13325872a3
141c7c2404
15128593b7
hexbebc1e4

199999972 has 12 divisors (see below), whose sum is σ = 361290496. Its totient is φ = 96774120.

The previous prime is 199999963. The next prime is 199999991. The reversal of 199999972 is 279999991.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 806328 + ... + 806575.

Almost surely, 2199999972 is an apocalyptic number.

It is an amenable number.

199999972 is a deficient number, since it is larger than the sum of its proper divisors (161290524).

199999972 is a wasteful number, since it uses less digits than its factorization.

199999972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612938 (or 1612936 counting only the distinct ones).

The product of its digits is 7440174, while the sum is 64.

The square root of 199999972 is about 14142.1346337814. The cubic root of 199999972 is about 584.8035203517.

The spelling of 199999972 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred seventy-two".

Divisors: 1 2 4 31 62 124 1612903 3225806 6451612 49999993 99999986 199999972